Pelagic Trawling Figures

Figure 2.4.1. The display of the Furuno CSH-5 Omni-directional Sonar shows
a horizontal (above) and vertical (below) image of a herring school. In
the horizontal view, the bottom is displayed as the circular ring along
the edge of the 200 m search radius. The vertical display shows herring
to be aggregated primarily in the 50-100 m portion of the water column.

Figure 2.5.1.Towpath (time vs. depth) for a midwater deployment.
Red lines denote depths of the headrope and footrope. Tow performance measurements
for the High Speed Midwater Rope Trawl were obtained from the Simrad ITI
and FS903 systems, and Vemco MiniLog temperature depth probes attached to
the headrope and footrope.